Answer to Question #230618 in Organic Chemistry for Kay

Question

37. Which of the following statements is INCORRECT?

(1) The bond angles involving the carbonyl group are approximately 120 O in ketones

(2) The resonance description of the polar carbonyl group is represented as follows: C O C O 30

(3) The ketone carbonyl group is more stable and less reactive towards nucleophiles than the aldehyde carbonyl group because the carbonyl carbon atom of a ketone bears two electron donating groups.

(4) Aldehydes and ketones undergo nucleophilic addition reactions to the carbonyl group, with the nucleophilic attack on the planar, uncrowded carbon atom and the electrophilic attack on the partially negative and weakly basic oxygen atom

Answer 1

(3) The ketone carbonyl group is more stable and less reactive towards nucleophiles than the aldehyde carbonyl group because the carbonyl carbon atom of a ketone bears two electron donating groups.